Blackfin arch: Fix PM building on BF52x: No ROTWE on BF52x, add USBWE

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c
index 6dac869..5fa53672 100644
--- a/arch/blackfin/mach-common/ints-priority.c
+++ b/arch/blackfin/mach-common/ints-priority.c
@@ -216,7 +216,7 @@
 	wakeup |= KPADWE;
 	break;
 #endif
-#ifdef IRQ_CNT
+#ifdef CONFIG_BF54x
 	case IRQ_CNT:
 	wakeup |= ROTWE;
 	break;